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Hybrid Complex Coacervate

Underwater adhesion represents a huge technological challenge as the presence of water compromises the performance of most commercially available adhesives. Inspired by natural organisms, we have designed an adhesive based on complex coacervation, a liquid–liquid phase separation phenomenon. A compl...

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Detalles Bibliográficos
Autores principales: Dompé, Marco, Cedano-Serrano, Francisco Javier, Vahdati, Mehdi, Hourdet, Dominique, van der Gucht, Jasper, Kamperman, Marleen, Kodger, Thomas E.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7077495/
https://www.ncbi.nlm.nih.gov/pubmed/32033133
http://dx.doi.org/10.3390/polym12020320
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author Dompé, Marco
Cedano-Serrano, Francisco Javier
Vahdati, Mehdi
Hourdet, Dominique
van der Gucht, Jasper
Kamperman, Marleen
Kodger, Thomas E.
author_facet Dompé, Marco
Cedano-Serrano, Francisco Javier
Vahdati, Mehdi
Hourdet, Dominique
van der Gucht, Jasper
Kamperman, Marleen
Kodger, Thomas E.
author_sort Dompé, Marco
collection PubMed
description Underwater adhesion represents a huge technological challenge as the presence of water compromises the performance of most commercially available adhesives. Inspired by natural organisms, we have designed an adhesive based on complex coacervation, a liquid–liquid phase separation phenomenon. A complex coacervate adhesive is formed by mixing oppositely charged polyelectrolytes bearing pendant thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) chains. The material fully sets underwater due to a change in the environmental conditions, namely temperature and ionic strength. In this work, we incorporate silica nanoparticles forming a hybrid complex coacervate and investigate the resulting mechanical properties. An enhancement of the mechanical properties is observed below the PNIPAM lower critical solution temperature (LCST): this is due to the formation of PNIPAM–silica junctions, which, after setting, contribute to a moderate increase in the moduli and in the adhesive properties only when applying an ionic strength gradient. By contrast, when raising the temperature above the LCST, the mechanical properties are dominated by the association of PNIPAM chains and the nanofiller incorporation leads to an increased heterogeneity with the formation of fracture planes at the interface between areas of different concentrations of nanoparticles, promoting earlier failure of the network—an unexpected and noteworthy consequence of this hybrid system.
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spelling pubmed-70774952020-03-20 Hybrid Complex Coacervate Dompé, Marco Cedano-Serrano, Francisco Javier Vahdati, Mehdi Hourdet, Dominique van der Gucht, Jasper Kamperman, Marleen Kodger, Thomas E. Polymers (Basel) Article Underwater adhesion represents a huge technological challenge as the presence of water compromises the performance of most commercially available adhesives. Inspired by natural organisms, we have designed an adhesive based on complex coacervation, a liquid–liquid phase separation phenomenon. A complex coacervate adhesive is formed by mixing oppositely charged polyelectrolytes bearing pendant thermoresponsive poly(N-isopropylacrylamide) (PNIPAM) chains. The material fully sets underwater due to a change in the environmental conditions, namely temperature and ionic strength. In this work, we incorporate silica nanoparticles forming a hybrid complex coacervate and investigate the resulting mechanical properties. An enhancement of the mechanical properties is observed below the PNIPAM lower critical solution temperature (LCST): this is due to the formation of PNIPAM–silica junctions, which, after setting, contribute to a moderate increase in the moduli and in the adhesive properties only when applying an ionic strength gradient. By contrast, when raising the temperature above the LCST, the mechanical properties are dominated by the association of PNIPAM chains and the nanofiller incorporation leads to an increased heterogeneity with the formation of fracture planes at the interface between areas of different concentrations of nanoparticles, promoting earlier failure of the network—an unexpected and noteworthy consequence of this hybrid system. MDPI 2020-02-04 /pmc/articles/PMC7077495/ /pubmed/32033133 http://dx.doi.org/10.3390/polym12020320 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Dompé, Marco
Cedano-Serrano, Francisco Javier
Vahdati, Mehdi
Hourdet, Dominique
van der Gucht, Jasper
Kamperman, Marleen
Kodger, Thomas E.
Hybrid Complex Coacervate
title Hybrid Complex Coacervate
title_full Hybrid Complex Coacervate
title_fullStr Hybrid Complex Coacervate
title_full_unstemmed Hybrid Complex Coacervate
title_short Hybrid Complex Coacervate
title_sort hybrid complex coacervate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7077495/
https://www.ncbi.nlm.nih.gov/pubmed/32033133
http://dx.doi.org/10.3390/polym12020320
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